tls version intolerance

July 2016 scan results

This month the scan has a bit more information.

I’ve added special probes to detect whether the server is intolerant to specific types of Client Hello messages.

While support for TLSv1.2 is still not universal (being just under 90%), tolerance to Client Hello messages advertising support for TLSv1.2 is essentially full, with just 67 servers being detected as intolerant to such messages.

Support for more uncommon messages is much worse though, clients sending their maximum supported version set to TLSv1.2 can expect 1.3% of servers rejecting their connections. Higher protocol versions like TLSv1.4 have a rate of rejection on around 2.45%, for very high protocol versions it rises to 3.295% for SSL 3.254 (that would be TLSv1.253).

Clients sending Client Hello with a lot of options or extensions can expect even more intolerance. Sending multiple key shares (from TLSv1.3 draft), most of defined extensions and couple hundred ciphersuites can expect their connections rejected by over 7% of servers. In general intolerance for very big Client Hello messages, like 16KiB and 24KiB large, is respectively at 23.7% and a whopping 89.5%!

If fixing this will follow similar deployment rates as TLSv1.2 or RC4 deprecation, it doesn’t look like we will be able to deploy most Post Quantum key exchanges any time soon…

Besides that, there were no major changes, just continuation of long established trends, so I won’t be doing full analysis for this month too.

SSL/TLS survey of 603391 websites from Alexa's top 1 million
Stats only from connections that did provide valid certificates
(or anonymous DH from servers that do also have valid certificate installed)


Supported Ciphers         Count     Percent
-------------------------+---------+-------
3DES                      532905    88.3184
3DES Only                 550       0.0912
3DES Preferred            1719      0.2849
3DES forced in TLS1.1+    992       0.1644
AES                       599329    99.3268
AES Only                  46610     7.7247
AES-CBC                   598756    99.2318
AES-CBC Only              4850      0.8038
AES-GCM                   509780    84.4858
AES-GCM Only              526       0.0872
CAMELLIA                  267705    44.3668
CAMELLIA Only             1         0.0002
CHACHA20                  83982     13.9183
CHACHA20 Only             3         0.0005
Insecure                  53186     8.8145
RC4                       153525    25.4437
RC4 Only                  140       0.0232
RC4 Preferred             12783     2.1185
RC4 forced in TLS1.1+     6911      1.1454
x:FF 29 3DES Only         597       0.0989
x:FF 29 3DES Preferred    2030      0.3364
x:FF 29 RC4 Only          193       0.032
x:FF 29 RC4 Preferred     14404     2.3872
x:FF 29 incompatible      530       0.0878
x:FF 35 3DES Only         605       0.1003
x:FF 35 3DES Preferred    1956      0.3242
x:FF 35 RC4 Only          218       0.0361
x:FF 35 RC4 Preferred     14418     2.3895
x:FF 35 incompatible      532       0.0882
x:FF 44 3DES Only         3874      0.642
x:FF 44 3DES Preferred    7464      1.237
x:FF 44 incompatible      750       0.1243
y:DHE-RSA-SEED-SHA        79084     13.1066
y:IDEA-CBC-SHA            75906     12.5799
y:SEED-SHA                90103     14.9328
z:ADH-AES128-GCM-SHA256   428       0.0709
z:ADH-AES128-SHA          715       0.1185
z:ADH-AES128-SHA256       281       0.0466
z:ADH-AES256-GCM-SHA384   442       0.0733
z:ADH-AES256-SHA          759       0.1258
z:ADH-AES256-SHA256       284       0.0471
z:ADH-CAMELLIA128-SHA     368       0.061
z:ADH-CAMELLIA128-SHA256  1         0.0002
z:ADH-CAMELLIA256-SHA     393       0.0651
z:ADH-CAMELLIA256-SHA256  1         0.0002
z:ADH-DES-CBC-SHA         279       0.0462
z:ADH-DES-CBC3-SHA        720       0.1193
z:ADH-RC4-MD5             517       0.0857
z:ADH-SEED-SHA            298       0.0494
z:AECDH-AES128-SHA        9498      1.5741
z:AECDH-AES256-SHA        9566      1.5854
z:AECDH-DES-CBC3-SHA      9463      1.5683
z:AECDH-NULL-SHA          60        0.0099
z:AECDH-RC4-SHA           8940      1.4816
z:DES-CBC-MD5             6015      0.9969
z:DES-CBC-SHA             33753     5.5939
z:DES-CBC3-MD5            15538     2.5751
z:ECDHE-RSA-NULL-SHA      67        0.0111
z:EDH-RSA-DES-CBC-SHA     28904     4.7903
z:EXP-ADH-DES-CBC-SHA     180       0.0298
z:EXP-ADH-RC4-MD5         178       0.0295
z:EXP-DES-CBC-SHA         9916      1.6434
z:EXP-EDH-RSA-DES-CBC-SHA 7950      1.3176
z:EXP-RC2-CBC-MD5         11811     1.9574
z:EXP-RC4-MD5             12355     2.0476
z:EXP1024-DES-CBC-SHA     3045      0.5046
z:EXP1024-RC4-SHA         3108      0.5151
z:IDEA-CBC-MD5            1225      0.203
z:NULL-MD5                196       0.0325
z:NULL-SHA                201       0.0333
z:NULL-SHA256             39        0.0065
z:RC2-CBC-MD5             6171      1.0227
z:RC4-64-MD5              692       0.1147

Cipher ordering           Count     Percent
-------------------------+---------+-------
Client side               149228    24.7316
Server side               454163    75.2684

Supported Handshakes      Count     Percent
-------------------------+---------+-------
ADH                       918       0.1521
AECDH                     9574      1.5867
DHE                       327644    54.3004
ECDH                      2         0.0003
ECDHE                     532966    88.3285
ECDHE and DHE             285103    47.2501
RSA                       517470    85.7603

Supported PFS             Count     Percent  PFS Percent
-------------------------+---------+--------+-----------
DH,1024bits               115821    19.195   35.3496
DH,2048bits               196265    32.527   59.9019
DH,2049bits               1         0.0002   0.0003
DH,2236bits               77        0.0128   0.0235
DH,2432bits               3         0.0005   0.0009
DH,3072bits               141       0.0234   0.043
DH,3092bits               2         0.0003   0.0006
DH,3196bits               1         0.0002   0.0003
DH,4096bits               14972     2.4813   4.5696
DH,512bits                122       0.0202   0.0372
DH,6144bits               1         0.0002   0.0003
DH,768bits                355       0.0588   0.1083
DH,8192bits               7         0.0012   0.0021
ECDH,B-571,570bits        4696      0.7783   0.8811
ECDH,K-163,163bits        1         0.0002   0.0002
ECDH,P-192,192bits        68        0.0113   0.0128
ECDH,P-224,224bits        91        0.0151   0.0171
ECDH,P-256,256bits        500295    82.9139  93.87
ECDH,P-384,384bits        12707     2.1059   2.3842
ECDH,P-521,521bits        17146     2.8416   3.2171
ECDH,brainpoolP512r1,512bits 3         0.0005   0.0006
ECDH,secp256k1,256bits    1         0.0002   0.0002
Prefer DH,1024bits        42440     7.0336   12.9531
Prefer DH,2048bits        4955      0.8212   1.5123
Prefer DH,3072bits        9         0.0015   0.0027
Prefer DH,3092bits        2         0.0003   0.0006
Prefer DH,4096bits        379       0.0628   0.1157
Prefer DH,768bits         33        0.0055   0.0101
Prefer ECDH,B-571,570bits 4438      0.7355   0.8327
Prefer ECDH,K-163,163bits 1         0.0002   0.0002
Prefer ECDH,P-192,192bits 1         0.0002   0.0002
Prefer ECDH,P-224,224bits 89        0.0147   0.0167
Prefer ECDH,P-256,256bits 465038    77.0708  87.2547
Prefer ECDH,P-384,384bits 10660     1.7667   2.0001
Prefer ECDH,P-521,521bits 15901     2.6353   2.9835
Prefer ECDH,brainpoolP512r1,512bits 3         0.0005   0.0006
Prefer ECDH,secp256k1,256bits 1         0.0002   0.0002
Prefer PFS                543950    90.1488  0
Support PFS               575507    95.3788  0

Supported ECC curves      Count     Percent 
-------------------------+---------+--------
None                      2         0.0003   
None Only                 2         0.0003   
brainpoolP256r1           27492     4.5562   
brainpoolP384r1           27491     4.5561   
brainpoolP512r1           27484     4.5549   
prime192v1                1647      0.273    
prime256v1                510415    84.5911  
prime256v1 Only           428464    71.0093  
secp160k1                 1528      0.2532   
secp160r1                 1536      0.2546   
secp160r2                 1528      0.2532   
secp192k1                 1543      0.2557   
secp224k1                 1625      0.2693   
secp224r1                 5406      0.8959   
secp256k1                 29683     4.9194   
secp384r1                 88419     14.6537  
secp384r1 Only            5169      0.8567   
secp521r1                 58499     9.695    
secp521r1 Only            153       0.0254   
sect163k1                 1531      0.2537   
sect163k1 Only            3         0.0005   
sect163r1                 1529      0.2534   
sect163r2                 1529      0.2534   
sect193r1                 1529      0.2534   
sect193r2                 1529      0.2534   
sect233k1                 1614      0.2675   
sect233r1                 1614      0.2675   
sect239k1                 1614      0.2675   
sect283k1                 28930     4.7946   
sect283k1 Only            2         0.0003   
sect283r1                 28927     4.7941   
sect409k1                 28927     4.7941   
sect409r1                 28927     4.7941   
sect571k1                 28927     4.7941   
sect571r1                 28930     4.7946   
server                    38445     6.3715   
server Only               38445     6.3715   

Unsupported curve fallback     Count     Percent 
------------------------------+---------+--------
False                          532806    88.3019  
unknown                        70585     11.6981  

ECC curve ordering        Count     Percent 
-------------------------+---------+--------
                          36744     6.0896   
client                    18027     2.9876   
server                    478197    79.2516  
unknown                   70423     11.6712  

TLSv1.2 PFS supported sigalgs  Count     Percent 
------------------------------+---------+--------
ECDSA-SHA1                     54563     9.0427   
ECDSA-SHA1 Only                9         0.0015   
ECDSA-SHA224                   54587     9.0467   
ECDSA-SHA256                   72567     12.0265  
ECDSA-SHA384                   72639     12.0385  
ECDSA-SHA512                   72750     12.0569  
ECDSA-SHA512 Only              118       0.0196   
RSA-MD5                        23842     3.9513   
RSA-SHA1                       462908    76.7178  
RSA-SHA1 Only                  30278     5.018    
RSA-SHA224                     387875    64.2825  
RSA-SHA256                     441866    73.2305  
RSA-SHA256 Only                8016      1.3285   
RSA-SHA384                     403401    66.8557  
RSA-SHA384 Only                4         0.0007   
RSA-SHA512                     403342    66.8459  
RSA-SHA512 Only                131       0.0217   

TLSv1.2 PFS ordering           Count     Percent 
------------------------------+---------+--------
client                         282677    46.8481  
indeterminate                  38        0.0063   
intolerant                     6561      1.0874   
order-fallback                 4         0.0007   
server                         236059    39.1221  
unsupported                    14339     2.3764   

TLSv1.2 PFS sigalg fallback    Count     Percent 
------------------------------+---------+--------
ECDSA SHA1                     54456     9.025    
ECDSA intolerant               652       0.1081   
ECDSA pfs-rsa-SHA512           17783     2.9472   
ECDSA soft-nopfs               15        0.0025   
RSA False                      23629     3.916    
RSA SHA1                       399316    66.1786  
RSA intolerant                 50007     8.2877   
RSA pfs-ecdsa-SHA512           99        0.0164   
RSA soft-nopfs                 389       0.0645   

Renegotiation             Count     Percent 
-------------------------+---------+--------
False                     4550      0.7541   
insecure                  15701     2.6021   
secure                    583140    96.6438  

Compression               Count     Percent 
-------------------------+---------+--------
1 (zlib compression)      6683      1.1076   
False                     4550      0.7541   
NONE                      592158    98.1384  

TLS session ticket hint   Count     Percent 
-------------------------+---------+--------
1                         3         0.0005   
1 only                    3         0.0005   
5                         8         0.0013   
5 only                    8         0.0013   
10                        9         0.0015   
10 only                   9         0.0015   
15                        7         0.0012   
15 only                   7         0.0012   
30                        29        0.0048   
30 only                   29        0.0048   
60                        172       0.0285   
60 only                   166       0.0275   
65                        2         0.0003   
65 only                   2         0.0003   
70                        6         0.001    
70 only                   4         0.0007   
75                        1         0.0002   
75 only                   1         0.0002   
90                        1         0.0002   
90 only                   1         0.0002   
100                       15        0.0025   
100 only                  15        0.0025   
120                       28        0.0046   
120 only                  28        0.0046   
128                       3         0.0005   
128 only                  2         0.0003   
150                       2         0.0003   
180                       83        0.0138   
180 only                  80        0.0133   
240                       12        0.002    
240 only                  12        0.002    
300                       306995    50.8783  
300 only                  304055    50.391   
302                       2         0.0003   
302 only                  2         0.0003   
360                       3         0.0005   
360 only                  2         0.0003   
400                       8         0.0013   
400 only                  8         0.0013   
420                       120       0.0199   
420 only                  103       0.0171   
480                       11        0.0018   
480 only                  11        0.0018   
500                       4         0.0007   
500 only                  4         0.0007   
540                       4         0.0007   
540 only                  4         0.0007   
600                       29961     4.9654   
600 only                  29817     4.9416   
630                       1         0.0002   
630 only                  1         0.0002   
700                       1         0.0002   
700 only                  1         0.0002   
720                       6         0.001    
720 only                  6         0.001    
840                       2         0.0003   
840 only                  2         0.0003   
900                       1560      0.2585   
900 only                  1541      0.2554   
960                       3         0.0005   
960 only                  3         0.0005   
1000                      1         0.0002   
1000 only                 1         0.0002   
1200                      3528      0.5847   
1200 only                 3525      0.5842   
1210                      2         0.0003   
1210 only                 2         0.0003   
1320                      1         0.0002   
1320 only                 1         0.0002   
1380                      1         0.0002   
1380 only                 1         0.0002   
1440                      1         0.0002   
1440 only                 1         0.0002   
1500                      4         0.0007   
1500 only                 3         0.0005   
1800                      860       0.1425   
1800 only                 839       0.139    
1980                      2         0.0003   
1980 only                 2         0.0003   
2100                      1         0.0002   
2400                      8         0.0013   
2400 only                 8         0.0013   
2700                      12        0.002    
2700 only                 12        0.002    
3000                      41        0.0068   
3000 only                 41        0.0068   
3600                      1100      0.1823   
3600 only                 1090      0.1806   
3900                      2         0.0003   
3900 only                 2         0.0003   
4200                      2         0.0003   
4200 only                 1         0.0002   
4500                      1         0.0002   
4500 only                 1         0.0002   
5160                      1         0.0002   
5160 only                 1         0.0002   
5400                      15        0.0025   
5400 only                 9         0.0015   
6000                      341       0.0565   
6000 only                 340       0.0563   
7200                      15389     2.5504   
7200 only                 15355     2.5448   
7500                      2         0.0003   
7500 only                 2         0.0003   
9000                      2         0.0003   
9000 only                 2         0.0003   
10800                     5322      0.882    
10800 only                5300      0.8784   
14400                     147       0.0244   
14400 only                144       0.0239   
18000                     9         0.0015   
18000 only                8         0.0013   
21600                     4353      0.7214   
21600 only                4353      0.7214   
25200                     1         0.0002   
25200 only                1         0.0002   
28800                     2164      0.3586   
28800 only                2164      0.3586   
30000                     2         0.0003   
30000 only                1         0.0002   
36000                     1239      0.2053   
36000 only                1231      0.204    
43200                     67        0.0111   
43200 only                67        0.0111   
54000                     2         0.0003   
54000 only                2         0.0003   
60000                     3         0.0005   
60000 only                3         0.0005   
64800                     73037     12.1044  
64800 only                73018     12.1013  
72000                     12        0.002    
72000 only                12        0.002    
79200                     1         0.0002   
79200 only                1         0.0002   
86400                     3232      0.5356   
86400 only                3222      0.534    
100800                    9169      1.5196   
100800 only               9156      1.5174   
108000                    1         0.0002   
108000 only               1         0.0002   
115200                    1         0.0002   
115200 only               1         0.0002   
129600                    6         0.001    
129600 only               6         0.001    
172800                    49        0.0081   
172800 only               49        0.0081   
216000                    3         0.0005   
216000 only               3         0.0005   
259200                    3         0.0005   
259200 only               3         0.0005   
432000                    1         0.0002   
432000 only               1         0.0002   
604800                    1         0.0002   
864000                    2         0.0003   
864000 only               2         0.0003   
7776000                   2         0.0003   
7776000 only              2         0.0003   
None                      147458    24.4382  
None only                 144200    23.8983  

Certificate sig alg     Count     Percent 
-------------------------+---------+--------
None                      10178     1.6868   
ecdsa-with-SHA256         70598     11.7002  
sha1WithRSAEncryption     17351     2.8756   
sha256WithRSAEncryption   533303    88.3843  
sha384WithRSAEncryption   7         0.0012   
sha512WithRSAEncryption   77        0.0128   

Certificate key size    Count     Percent 
-------------------------+---------+--------
ECDSA 256                 72865     12.0759  
ECDSA 384                 41        0.0068   
ECDSA 521                 1         0.0002   
RSA 1024                  14        0.0023   
RSA 2048                  516458    85.5926  
RSA 2049                  4         0.0007   
RSA 2056                  1         0.0002   
RSA 2058                  3         0.0005   
RSA 2059                  1         0.0002   
RSA 2080                  6         0.001    
RSA 2084                  1         0.0002   
RSA 2086                  1         0.0002   
RSA 2096                  3         0.0005   
RSA 2408                  1         0.0002   
RSA 2432                  6         0.001    
RSA 2560                  1         0.0002   
RSA 2948                  1         0.0002   
RSA 3072                  158       0.0262   
RSA 3096                  2         0.0003   
RSA 3120                  1         0.0002   
RSA 3248                  3         0.0005   
RSA 4048                  3         0.0005   
RSA 4056                  21        0.0035   
RSA 4069                  1         0.0002   
RSA 4086                  3         0.0005   
RSA 4092                  2         0.0003   
RSA 4094                  1         0.0002   
RSA 4095                  1         0.0002   
RSA 4096                  33887     5.6161   
RSA 4196                  1         0.0002   
RSA 8192                  12        0.002    
RSA 8392                  1         0.0002   
RSA/ECDSA Dual Stack      20097     3.3307

OCSP stapling             Count     Percent 
-------------------------+---------+--------
Supported                 139486    23.117   
Unsupported               463905    76.883   

Supported Protocols       Count     Percent
-------------------------+---------+-------
SSL2                      15694     2.601
SSL2 Only                 9         0.0015
SSL3                      88647     14.6915
SSL3 Only                 325       0.0539
SSL3 or TLS1 Only         47120     7.8092
SSL3 or lower Only        335       0.0555
TLS1                      590402    97.8473
TLS1 Only                 28435     4.7125
TLS1 or lower Only        61759     10.2353
TLS1.1                    532582    88.2648
TLS1.1 Only               43        0.0071
TLS1.1 or up Only         12475     2.0675
TLS1.2                    539663    89.4384
TLS1.2 Only               3587      0.5945
TLS1.2, 1.0 but not 1.1   5029      0.8335

Client Hello intolerance                 Count     Percent
----------------------------------------+---------+-------
Huge Cipher List                         539862    89.4713
Huge Cipher List (trunc 16388)           143271    23.7443
SSL 3.254                                19882     3.295
TLS 1.0                                  66391     11.003
TLS 1.1                                  3190      0.5287
TLS 1.2                                  67        0.0111
TLS 1.3                                  7896      1.3086
TLS 1.4                                  14758     2.4458
Xmas tree                                43001     7.1266
x:missing information                    44        0.0073



Statistics from 544239 chains provided by 734331 hosts

Server provided chains    Count     Percent
-------------------------+---------+-------
complete                  493648    67.2242
incomplete                20056     2.7312
untrusted                 220627    30.0446

Trusted chain statistics
========================

Chain length              Count     Percent
-------------------------+---------+-------
2                         1         0.0002
3                         540295    99.2753
4                         3930      0.7221
5                         13        0.0024

CA key size in chains     Count
-------------------------+---------
ECDSA 256                 30197     
ECDSA 384                 30193     
RSA 1024                  9         
RSA 2045                  2         
RSA 2048                  845143    
RSA 4096                  186889    

Chains with CA key        Count     Percent
-------------------------+---------+-------
ECDSA 256                 30197     5.5485
ECDSA 384                 30193     5.5477
RSA 1024                  7         0.0013
RSA 2045                  2         0.0004
RSA 2048                  513612    94.3725
RSA 4096                  186227    34.2179

Signature algorithm (ex. root) Count
------------------------------+---------
ecdsa-with-SHA384              30185     
sha1WithRSAEncryption          20474     
sha256WithRSAEncryption        330105    
sha384WithRSAEncryption        167373    
sha512WithRSAEncryption        57        

Eff. host cert chain LoS  Count     Percent
-------------------------+---------+-------
80                        20448     3.7572
112                       493575    90.6909
128                       30216     5.552

Most popular root CAs                         Count     Percent
---------------------------------------------+---------+-------
(d6325660) COMODO RSA Certification Authority 149876    27.5386
(2c543cd1) GeoTrust Global CA                 82272     15.1169
(cbf06781) Go Daddy Root Certificate Authorit 46152     8.4801
(5ad8a5d6) GlobalSign Root CA                 42046     7.7256
(b204d74a) VeriSign Class 3 Public Primary Ce 30585     5.6198
(eed8c118) COMODO ECC Certification Authority 30178     5.545
(244b5494) DigiCert High Assurance EV Root CA 21202     3.8957
(2e4eed3c) thawte Primary Root CA             17390     3.1953
(fc5a8f99) USERTrust RSA Certification Author 17354     3.1887
(2e5ac55d) DST Root CA X3                     16492     3.0303
(653b494a) Baltimore CyberTrust Root          11315     2.079
(3513523f) DigiCert Global Root CA            10347     1.9012
(ae8153b9) StartCom Certification Authority   9044      1.6618
(4bfab552) Starfield Root Certificate Authori 9012      1.6559
(e2799e36) GeoTrust Primary Certification Aut 6148      1.1297
(480720ec) GeoTrust Primary Certification Aut 5775      1.0611
(02265526) Entrust Root Certification Authori 3969      0.7293
(ba89ed3b) thawte Primary Root CA - G3        3394      0.6236
(8096d0a9) Certification Authority of WoSign  2877      0.5286
(157753a5) AddTrust External CA Root          2782      0.5112

Most popular intermediate CA                  Count     Percent
---------------------------------------------+---------+-------
(8d28ae65) COMODO RSA Domain Validation Secur 100923    18.5439
(27eb7704) Go Daddy Secure Certificate Author 46152     8.4801
(53f3e569) RapidSSL SHA256 CA - G3            40339     7.412
(6cfa716c) COMODO ECC Domain Validation Secur 30126     5.5354
(7d9c641e) Symantec Class 3 Secure Server CA  21662     3.9802
(1400f578) cPanel, Inc. Certification Authori 19580     3.5977
(38ae8eda) DigiCert SHA2 High Assurance Serve 17140     3.1494
(4f06f81d) Let's Encrypt Authority X3         16492     3.0303
(16744f0c) AlphaSSL CA - SHA256 - G2          16239     2.9838
(493a2f06) COMODO RSA Domain Validation Secur 13442     2.4699
(10310d4b) GeoTrust SSL CA - G3               13423     2.4664
(80ecc636) RapidSSL SHA256 CA                 12795     2.351
(d7d634d4) GlobalSign Domain Validation CA -  11432     2.1005
(b85455c4) GlobalSign Organization Validation 11363     2.0879
(c43a77d9) COMODO RSA Organization Validation 11217     2.061
(85cf5865) DigiCert SHA2 Secure Server CA     10208     1.8756
(9ad474ec) thawte SSL CA - G2                 9146      1.6805
(cd7781e5) Starfield Secure Certificate Autho 9012      1.6559
(d84ef247) GeoTrust DV SSL CA - G4            7163      1.3161
(a0f7ac3e) Symantec Class 3 EV SSL CA - G3    7144      1.3127
(3d97f5e2) Verizon Akamai SureServer CA G14-S 7025      1.2908
(fd917e82) SecureCore RSA DV CA               6995      1.2853
(b71a5f76) GeoTrust EV SSL CA - G4            5724      1.0517
(661c52cc) thawte DV SSL CA - G2              5368      0.9863
(e22cd3f0) COMODO RSA Extended Validation Sec 4365      0.802
(7f8496de) StartCom Class 1 DV Server CA      3678      0.6758
(45bfefc3) DigiCert SHA2 Extended Validation  3527      0.6481
(2835d715) Entrust Certification Authority -  3328      0.6115
(f131b364) RapidSSL CA                        3180      0.5843
(98d7cad7) GeoTrust DV SSL CA - G3            3154      0.5795



Scan performed between 20th of July and 17th of August 2016
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